package homework04;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Column2 {// 映射类中的属性成一个行信息
	public String value() default "";

	public boolean nullable() default true;

	public int length() default -1;
}
